1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lisa [10]
4 years ago
13

Before there was any life on earth, which gas was absent from earth’s ancient atmosphere?

Biology
2 answers:
Gre4nikov [31]4 years ago
6 0

Oxygen is your answer.

thanks and hope help

Anit [1.1K]4 years ago
5 0
Oxygen was absent from the atmosphere it has only been present for the past 2.7-2.8 billion years but the earth is approximately 4.5 billion years old.
You might be interested in
ASAP PLEASE HELP WILL MARK BRAINLYIEST!!!!
djyliett [7]
Metaphase. In all versions of metaphase the chromosomes line up in the middle of the cell.
5 0
3 years ago
Global bee populations have been declining over the past decade. What impact might this have on the world's human population?
aev [14]

Answer:

Bees play a significant role in the field of agriculture. They can adapt to the process of pollination. Pollination is usually defined as the process of transportation of pollen grains from the male anther of a flower to the female stigma. The bees pollinate the crops and increases their productivity and yield capacity. About 35% of the food that we eat, are dependent on this pollination act that is carried out by the bees, involving either directly or indirectly.

Over the last few decades, the population of the bee has been decreasing, and it is directly affecting the global human population. It is because less amount of food is produced compared to the rate of demand, resulting in a shortage of food items.

7 0
3 years ago
Regrowth of plants after a forest fire is an example of ___.
vfiekz [6]
I believe the answer you are looking for is secondary regrowth. Hope this helps
7 0
3 years ago
Help me please I’m takin a test <br> Earth and space
sergeinik [125]
I feel as if that Answer is D
6 0
2 years ago
Read 2 more answers
Which are causes of mechanical weathering? Select three options.
GarryVolchara [31]
A) acid rain
D) carbon dioxide
E) pressure release
5 0
4 years ago
Read 2 more answers
Other questions:
  • 2 Points
    8·1 answer
  • What layer of the skin is composed of fatty tissue and serves as an insulator for the body?
    10·1 answer
  • NAME: Dates 1. The can be thought of as a screen that allows certain substances to pass through into the cell while others canno
    10·1 answer
  • Asked this question before, didn't really help so i'm asking again. also, please help.
    10·1 answer
  • In what process do bacteria break nitrogen gas down into a usable form for plants?
    13·1 answer
  • Which organelle is found in both eukaryotic cells and prokaryotic cells:
    10·1 answer
  • Early cells likely formed from a group of organic compounds, including proteins, and primitive fatty acids. Why do most scientis
    9·1 answer
  • What do all of the terrestrial planets have in common?
    10·1 answer
  • Essential nutrients move through a cell membrane by both passive transport and active transport. Which of the following correctl
    15·1 answer
  • Can someone please check if the labels and everything on this diagram is correct.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!